/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 05:12:10,973 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 05:12:10,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 05:12:11,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 05:12:11,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 05:12:11,027 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 05:12:11,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 05:12:11,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 05:12:11,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 05:12:11,040 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 05:12:11,041 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 05:12:11,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 05:12:11,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 05:12:11,045 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 05:12:11,048 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 05:12:11,049 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 05:12:11,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 05:12:11,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 05:12:11,053 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 05:12:11,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 05:12:11,064 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 05:12:11,065 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 05:12:11,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 05:12:11,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 05:12:11,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 05:12:11,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 05:12:11,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 05:12:11,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 05:12:11,097 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 05:12:11,119 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 05:12:11,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 05:12:11,120 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 05:12:11,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 05:12:11,121 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 05:12:11,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 05:12:11,121 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 05:12:11,121 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 05:12:11,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 05:12:11,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 05:12:11,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 05:12:11,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 05:12:11,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 05:12:11,123 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 05:12:11,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 05:12:11,123 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 05:12:11,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 05:12:11,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 05:12:11,123 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 05:12:11,124 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 05:12:11,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 05:12:11,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 05:12:11,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 05:12:11,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 05:12:11,125 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 05:12:11,125 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 05:12:11,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 05:12:11,125 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 05:12:11,125 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 05:12:11,126 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; [2020-08-19 05:12:11,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 05:12:11,444 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 05:12:11,448 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 05:12:11,449 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 05:12:11,450 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 05:12:11,451 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-08-19 05:12:11,523 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f9b31b998/642e614ec24c44948949767f109ab06e/FLAGd73299dc9 [2020-08-19 05:12:11,999 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 05:12:12,000 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_9.c [2020-08-19 05:12:12,007 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f9b31b998/642e614ec24c44948949767f109ab06e/FLAGd73299dc9 [2020-08-19 05:12:12,368 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f9b31b998/642e614ec24c44948949767f109ab06e [2020-08-19 05:12:12,376 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 05:12:12,378 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 05:12:12,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 05:12:12,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 05:12:12,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 05:12:12,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:12:12" (1/1) ... [2020-08-19 05:12:12,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66948a6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:12, skipping insertion in model container [2020-08-19 05:12:12,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:12:12" (1/1) ... [2020-08-19 05:12:12,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 05:12:12,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 05:12:12,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:12:12,632 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 05:12:12,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:12:12,672 INFO L208 MainTranslator]: Completed translation [2020-08-19 05:12:12,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:12 WrapperNode [2020-08-19 05:12:12,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 05:12:12,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 05:12:12,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 05:12:12,674 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 05:12:12,774 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:12" (1/1) ... [2020-08-19 05:12:12,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:12" (1/1) ... [2020-08-19 05:12:12,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:12" (1/1) ... [2020-08-19 05:12:12,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:12" (1/1) ... [2020-08-19 05:12:12,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:12" (1/1) ... [2020-08-19 05:12:12,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:12" (1/1) ... [2020-08-19 05:12:12,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:12" (1/1) ... [2020-08-19 05:12:12,798 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 05:12:12,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 05:12:12,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 05:12:12,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 05:12:12,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:12" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 05:12:12,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 05:12:12,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 05:12:12,862 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 05:12:12,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 05:12:12,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 05:12:12,863 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 05:12:12,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 05:12:12,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 05:12:13,128 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 05:12:13,129 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 05:12:13,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:12:13 BoogieIcfgContainer [2020-08-19 05:12:13,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 05:12:13,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 05:12:13,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 05:12:13,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 05:12:13,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 05:12:12" (1/3) ... [2020-08-19 05:12:13,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8c511f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:12:13, skipping insertion in model container [2020-08-19 05:12:13,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:12" (2/3) ... [2020-08-19 05:12:13,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8c511f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:12:13, skipping insertion in model container [2020-08-19 05:12:13,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:12:13" (3/3) ... [2020-08-19 05:12:13,143 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-08-19 05:12:13,157 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 05:12:13,166 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 05:12:13,185 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 05:12:13,224 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 05:12:13,224 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 05:12:13,224 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 05:12:13,224 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 05:12:13,225 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 05:12:13,225 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 05:12:13,225 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 05:12:13,225 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 05:12:13,245 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-08-19 05:12:13,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 05:12:13,253 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:13,254 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:13,255 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:13,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:13,262 INFO L82 PathProgramCache]: Analyzing trace with hash 691982780, now seen corresponding path program 1 times [2020-08-19 05:12:13,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:13,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696441908] [2020-08-19 05:12:13,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:13,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:13,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:13,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:13,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:13,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696441908] [2020-08-19 05:12:13,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:13,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:13,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953936835] [2020-08-19 05:12:13,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:13,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:13,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:13,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:13,522 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-08-19 05:12:13,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:13,599 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2020-08-19 05:12:13,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:13,601 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 05:12:13,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:13,614 INFO L225 Difference]: With dead ends: 81 [2020-08-19 05:12:13,614 INFO L226 Difference]: Without dead ends: 66 [2020-08-19 05:12:13,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:13,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-19 05:12:13,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-08-19 05:12:13,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-19 05:12:13,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2020-08-19 05:12:13,665 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 19 [2020-08-19 05:12:13,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:13,666 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2020-08-19 05:12:13,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:13,666 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2020-08-19 05:12:13,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 05:12:13,667 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:13,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:13,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 05:12:13,668 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:13,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:13,669 INFO L82 PathProgramCache]: Analyzing trace with hash 950148218, now seen corresponding path program 1 times [2020-08-19 05:12:13,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:13,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142341790] [2020-08-19 05:12:13,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:13,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:13,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:13,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:13,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:13,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142341790] [2020-08-19 05:12:13,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:13,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:13,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468889684] [2020-08-19 05:12:13,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:13,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:13,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:13,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:13,740 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand 3 states. [2020-08-19 05:12:13,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:13,768 INFO L93 Difference]: Finished difference Result 107 states and 192 transitions. [2020-08-19 05:12:13,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:13,769 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 05:12:13,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:13,771 INFO L225 Difference]: With dead ends: 107 [2020-08-19 05:12:13,771 INFO L226 Difference]: Without dead ends: 66 [2020-08-19 05:12:13,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:13,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-19 05:12:13,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-08-19 05:12:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-19 05:12:13,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 113 transitions. [2020-08-19 05:12:13,784 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 113 transitions. Word has length 19 [2020-08-19 05:12:13,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:13,785 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 113 transitions. [2020-08-19 05:12:13,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:13,785 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 113 transitions. [2020-08-19 05:12:13,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 05:12:13,786 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:13,787 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:13,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 05:12:13,787 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:13,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:13,788 INFO L82 PathProgramCache]: Analyzing trace with hash -23156596, now seen corresponding path program 1 times [2020-08-19 05:12:13,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:13,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329237174] [2020-08-19 05:12:13,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:13,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:13,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:13,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:13,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329237174] [2020-08-19 05:12:13,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:13,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:13,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098021573] [2020-08-19 05:12:13,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:13,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:13,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:13,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:13,872 INFO L87 Difference]: Start difference. First operand 64 states and 113 transitions. Second operand 3 states. [2020-08-19 05:12:13,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:13,896 INFO L93 Difference]: Finished difference Result 99 states and 171 transitions. [2020-08-19 05:12:13,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:13,897 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 05:12:13,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:13,899 INFO L225 Difference]: With dead ends: 99 [2020-08-19 05:12:13,899 INFO L226 Difference]: Without dead ends: 69 [2020-08-19 05:12:13,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:13,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-19 05:12:13,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-08-19 05:12:13,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-19 05:12:13,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 115 transitions. [2020-08-19 05:12:13,911 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 115 transitions. Word has length 20 [2020-08-19 05:12:13,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:13,912 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 115 transitions. [2020-08-19 05:12:13,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:13,912 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 115 transitions. [2020-08-19 05:12:13,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 05:12:13,913 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:13,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:13,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 05:12:13,914 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:13,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:13,915 INFO L82 PathProgramCache]: Analyzing trace with hash -609962610, now seen corresponding path program 1 times [2020-08-19 05:12:13,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:13,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739809133] [2020-08-19 05:12:13,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:13,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:13,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:13,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739809133] [2020-08-19 05:12:13,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:13,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:13,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8764555] [2020-08-19 05:12:13,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:13,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:13,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:13,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:13,963 INFO L87 Difference]: Start difference. First operand 67 states and 115 transitions. Second operand 3 states. [2020-08-19 05:12:14,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:14,011 INFO L93 Difference]: Finished difference Result 124 states and 216 transitions. [2020-08-19 05:12:14,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:14,011 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 05:12:14,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:14,013 INFO L225 Difference]: With dead ends: 124 [2020-08-19 05:12:14,014 INFO L226 Difference]: Without dead ends: 122 [2020-08-19 05:12:14,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:14,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-19 05:12:14,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2020-08-19 05:12:14,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-19 05:12:14,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 152 transitions. [2020-08-19 05:12:14,027 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 152 transitions. Word has length 20 [2020-08-19 05:12:14,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:14,028 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 152 transitions. [2020-08-19 05:12:14,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:14,028 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 152 transitions. [2020-08-19 05:12:14,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 05:12:14,029 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:14,029 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:14,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 05:12:14,030 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:14,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:14,030 INFO L82 PathProgramCache]: Analyzing trace with hash -351797172, now seen corresponding path program 1 times [2020-08-19 05:12:14,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:14,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472064774] [2020-08-19 05:12:14,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:14,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:14,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:14,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472064774] [2020-08-19 05:12:14,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:14,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:14,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606027256] [2020-08-19 05:12:14,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:14,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:14,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:14,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:14,078 INFO L87 Difference]: Start difference. First operand 88 states and 152 transitions. Second operand 3 states. [2020-08-19 05:12:14,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:14,103 INFO L93 Difference]: Finished difference Result 204 states and 358 transitions. [2020-08-19 05:12:14,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:14,104 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 05:12:14,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:14,106 INFO L225 Difference]: With dead ends: 204 [2020-08-19 05:12:14,106 INFO L226 Difference]: Without dead ends: 124 [2020-08-19 05:12:14,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:14,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-19 05:12:14,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-08-19 05:12:14,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-19 05:12:14,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 210 transitions. [2020-08-19 05:12:14,121 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 210 transitions. Word has length 20 [2020-08-19 05:12:14,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:14,122 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 210 transitions. [2020-08-19 05:12:14,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:14,122 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 210 transitions. [2020-08-19 05:12:14,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 05:12:14,123 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:14,124 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:14,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 05:12:14,124 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:14,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:14,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1728757681, now seen corresponding path program 1 times [2020-08-19 05:12:14,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:14,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394580390] [2020-08-19 05:12:14,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:14,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:14,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:14,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394580390] [2020-08-19 05:12:14,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:14,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:14,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332164020] [2020-08-19 05:12:14,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:14,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:14,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:14,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:14,170 INFO L87 Difference]: Start difference. First operand 122 states and 210 transitions. Second operand 3 states. [2020-08-19 05:12:14,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:14,190 INFO L93 Difference]: Finished difference Result 183 states and 313 transitions. [2020-08-19 05:12:14,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:14,191 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 05:12:14,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:14,193 INFO L225 Difference]: With dead ends: 183 [2020-08-19 05:12:14,193 INFO L226 Difference]: Without dead ends: 126 [2020-08-19 05:12:14,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:14,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-19 05:12:14,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-08-19 05:12:14,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-19 05:12:14,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 210 transitions. [2020-08-19 05:12:14,208 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 210 transitions. Word has length 21 [2020-08-19 05:12:14,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:14,209 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 210 transitions. [2020-08-19 05:12:14,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:14,209 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 210 transitions. [2020-08-19 05:12:14,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 05:12:14,211 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:14,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:14,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 05:12:14,211 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:14,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:14,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1979403601, now seen corresponding path program 1 times [2020-08-19 05:12:14,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:14,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651423213] [2020-08-19 05:12:14,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:14,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:14,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:14,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651423213] [2020-08-19 05:12:14,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:14,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:14,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889351019] [2020-08-19 05:12:14,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:14,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:14,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:14,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:14,298 INFO L87 Difference]: Start difference. First operand 124 states and 210 transitions. Second operand 3 states. [2020-08-19 05:12:14,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:14,316 INFO L93 Difference]: Finished difference Result 228 states and 392 transitions. [2020-08-19 05:12:14,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:14,317 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 05:12:14,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:14,319 INFO L225 Difference]: With dead ends: 228 [2020-08-19 05:12:14,319 INFO L226 Difference]: Without dead ends: 226 [2020-08-19 05:12:14,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:14,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-19 05:12:14,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2020-08-19 05:12:14,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-19 05:12:14,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 282 transitions. [2020-08-19 05:12:14,334 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 282 transitions. Word has length 21 [2020-08-19 05:12:14,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:14,334 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 282 transitions. [2020-08-19 05:12:14,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:14,335 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 282 transitions. [2020-08-19 05:12:14,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 05:12:14,336 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:14,336 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:14,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 05:12:14,337 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:14,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:14,337 INFO L82 PathProgramCache]: Analyzing trace with hash -2057398257, now seen corresponding path program 1 times [2020-08-19 05:12:14,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:14,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411194350] [2020-08-19 05:12:14,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:14,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:14,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:14,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:14,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411194350] [2020-08-19 05:12:14,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:14,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:14,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833800170] [2020-08-19 05:12:14,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:14,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:14,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:14,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:14,374 INFO L87 Difference]: Start difference. First operand 168 states and 282 transitions. Second operand 3 states. [2020-08-19 05:12:14,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:14,393 INFO L93 Difference]: Finished difference Result 392 states and 664 transitions. [2020-08-19 05:12:14,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:14,394 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 05:12:14,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:14,396 INFO L225 Difference]: With dead ends: 392 [2020-08-19 05:12:14,396 INFO L226 Difference]: Without dead ends: 234 [2020-08-19 05:12:14,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:14,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-19 05:12:14,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-08-19 05:12:14,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-19 05:12:14,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 386 transitions. [2020-08-19 05:12:14,413 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 386 transitions. Word has length 21 [2020-08-19 05:12:14,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:14,414 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 386 transitions. [2020-08-19 05:12:14,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:14,414 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 386 transitions. [2020-08-19 05:12:14,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 05:12:14,416 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:14,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:14,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 05:12:14,416 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:14,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:14,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1232183873, now seen corresponding path program 1 times [2020-08-19 05:12:14,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:14,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905731743] [2020-08-19 05:12:14,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:14,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:14,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:14,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905731743] [2020-08-19 05:12:14,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:14,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:14,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132013403] [2020-08-19 05:12:14,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:14,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:14,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:14,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:14,471 INFO L87 Difference]: Start difference. First operand 232 states and 386 transitions. Second operand 3 states. [2020-08-19 05:12:14,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:14,489 INFO L93 Difference]: Finished difference Result 348 states and 576 transitions. [2020-08-19 05:12:14,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:14,490 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 05:12:14,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:14,492 INFO L225 Difference]: With dead ends: 348 [2020-08-19 05:12:14,492 INFO L226 Difference]: Without dead ends: 238 [2020-08-19 05:12:14,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:14,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-19 05:12:14,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2020-08-19 05:12:14,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-19 05:12:14,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 386 transitions. [2020-08-19 05:12:14,507 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 386 transitions. Word has length 22 [2020-08-19 05:12:14,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:14,508 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 386 transitions. [2020-08-19 05:12:14,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:14,508 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 386 transitions. [2020-08-19 05:12:14,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 05:12:14,510 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:14,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:14,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 05:12:14,511 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:14,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:14,511 INFO L82 PathProgramCache]: Analyzing trace with hash 645377859, now seen corresponding path program 1 times [2020-08-19 05:12:14,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:14,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993384107] [2020-08-19 05:12:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:14,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:14,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993384107] [2020-08-19 05:12:14,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:14,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:14,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342308809] [2020-08-19 05:12:14,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:14,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:14,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:14,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:14,544 INFO L87 Difference]: Start difference. First operand 236 states and 386 transitions. Second operand 3 states. [2020-08-19 05:12:14,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:14,563 INFO L93 Difference]: Finished difference Result 428 states and 712 transitions. [2020-08-19 05:12:14,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:14,564 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 05:12:14,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:14,567 INFO L225 Difference]: With dead ends: 428 [2020-08-19 05:12:14,567 INFO L226 Difference]: Without dead ends: 426 [2020-08-19 05:12:14,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:14,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-19 05:12:14,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2020-08-19 05:12:14,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-08-19 05:12:14,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 526 transitions. [2020-08-19 05:12:14,583 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 526 transitions. Word has length 22 [2020-08-19 05:12:14,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:14,584 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 526 transitions. [2020-08-19 05:12:14,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:14,584 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 526 transitions. [2020-08-19 05:12:14,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 05:12:14,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:14,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:14,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 05:12:14,591 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:14,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:14,591 INFO L82 PathProgramCache]: Analyzing trace with hash 903543297, now seen corresponding path program 1 times [2020-08-19 05:12:14,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:14,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202310013] [2020-08-19 05:12:14,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:14,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:14,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:14,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202310013] [2020-08-19 05:12:14,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:14,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:14,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000786505] [2020-08-19 05:12:14,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:14,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:14,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:14,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:14,656 INFO L87 Difference]: Start difference. First operand 328 states and 526 transitions. Second operand 3 states. [2020-08-19 05:12:14,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:14,711 INFO L93 Difference]: Finished difference Result 764 states and 1232 transitions. [2020-08-19 05:12:14,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:14,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 05:12:14,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:14,714 INFO L225 Difference]: With dead ends: 764 [2020-08-19 05:12:14,715 INFO L226 Difference]: Without dead ends: 450 [2020-08-19 05:12:14,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:14,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-08-19 05:12:14,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-08-19 05:12:14,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-08-19 05:12:14,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 710 transitions. [2020-08-19 05:12:14,746 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 710 transitions. Word has length 22 [2020-08-19 05:12:14,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:14,746 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 710 transitions. [2020-08-19 05:12:14,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:14,747 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 710 transitions. [2020-08-19 05:12:14,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 05:12:14,748 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:14,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:14,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 05:12:14,749 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:14,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:14,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1467908124, now seen corresponding path program 1 times [2020-08-19 05:12:14,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:14,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316399589] [2020-08-19 05:12:14,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:14,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:14,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316399589] [2020-08-19 05:12:14,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:14,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:14,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943892836] [2020-08-19 05:12:14,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:14,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:14,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:14,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:14,799 INFO L87 Difference]: Start difference. First operand 448 states and 710 transitions. Second operand 3 states. [2020-08-19 05:12:14,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:14,819 INFO L93 Difference]: Finished difference Result 672 states and 1060 transitions. [2020-08-19 05:12:14,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:14,820 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 05:12:14,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:14,823 INFO L225 Difference]: With dead ends: 672 [2020-08-19 05:12:14,824 INFO L226 Difference]: Without dead ends: 458 [2020-08-19 05:12:14,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:14,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-19 05:12:14,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-08-19 05:12:14,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-19 05:12:14,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 710 transitions. [2020-08-19 05:12:14,846 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 710 transitions. Word has length 23 [2020-08-19 05:12:14,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:14,846 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 710 transitions. [2020-08-19 05:12:14,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:14,846 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 710 transitions. [2020-08-19 05:12:14,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 05:12:14,850 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:14,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:14,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 05:12:14,859 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:14,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:14,860 INFO L82 PathProgramCache]: Analyzing trace with hash -2054714138, now seen corresponding path program 1 times [2020-08-19 05:12:14,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:14,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377666287] [2020-08-19 05:12:14,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:14,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:14,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:14,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:14,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377666287] [2020-08-19 05:12:14,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:14,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:14,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942690349] [2020-08-19 05:12:14,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:14,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:14,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:14,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:14,908 INFO L87 Difference]: Start difference. First operand 456 states and 710 transitions. Second operand 3 states. [2020-08-19 05:12:14,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:14,935 INFO L93 Difference]: Finished difference Result 812 states and 1288 transitions. [2020-08-19 05:12:14,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:14,935 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 05:12:14,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:14,940 INFO L225 Difference]: With dead ends: 812 [2020-08-19 05:12:14,940 INFO L226 Difference]: Without dead ends: 810 [2020-08-19 05:12:14,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:14,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-08-19 05:12:14,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 648. [2020-08-19 05:12:14,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-08-19 05:12:14,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 982 transitions. [2020-08-19 05:12:14,962 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 982 transitions. Word has length 23 [2020-08-19 05:12:14,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:14,962 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 982 transitions. [2020-08-19 05:12:14,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:14,962 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 982 transitions. [2020-08-19 05:12:14,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 05:12:14,964 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:14,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:14,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 05:12:14,964 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:14,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:14,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1796548700, now seen corresponding path program 1 times [2020-08-19 05:12:14,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:14,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389769385] [2020-08-19 05:12:14,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:14,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:14,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:14,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389769385] [2020-08-19 05:12:14,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:14,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:14,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392909060] [2020-08-19 05:12:14,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:14,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:14,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:14,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:14,999 INFO L87 Difference]: Start difference. First operand 648 states and 982 transitions. Second operand 3 states. [2020-08-19 05:12:15,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:15,026 INFO L93 Difference]: Finished difference Result 1500 states and 2280 transitions. [2020-08-19 05:12:15,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:15,027 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 05:12:15,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:15,032 INFO L225 Difference]: With dead ends: 1500 [2020-08-19 05:12:15,032 INFO L226 Difference]: Without dead ends: 874 [2020-08-19 05:12:15,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:15,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-08-19 05:12:15,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2020-08-19 05:12:15,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-19 05:12:15,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1302 transitions. [2020-08-19 05:12:15,066 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1302 transitions. Word has length 23 [2020-08-19 05:12:15,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:15,067 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1302 transitions. [2020-08-19 05:12:15,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:15,067 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1302 transitions. [2020-08-19 05:12:15,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 05:12:15,069 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:15,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:15,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 05:12:15,070 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:15,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:15,070 INFO L82 PathProgramCache]: Analyzing trace with hash 728586230, now seen corresponding path program 1 times [2020-08-19 05:12:15,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:15,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192108359] [2020-08-19 05:12:15,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:15,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:15,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:15,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:15,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192108359] [2020-08-19 05:12:15,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:15,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:15,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232838765] [2020-08-19 05:12:15,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:15,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:15,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:15,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:15,096 INFO L87 Difference]: Start difference. First operand 872 states and 1302 transitions. Second operand 3 states. [2020-08-19 05:12:15,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:15,128 INFO L93 Difference]: Finished difference Result 1308 states and 1944 transitions. [2020-08-19 05:12:15,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:15,129 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 05:12:15,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:15,136 INFO L225 Difference]: With dead ends: 1308 [2020-08-19 05:12:15,136 INFO L226 Difference]: Without dead ends: 890 [2020-08-19 05:12:15,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:15,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-19 05:12:15,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2020-08-19 05:12:15,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-08-19 05:12:15,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1302 transitions. [2020-08-19 05:12:15,173 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1302 transitions. Word has length 24 [2020-08-19 05:12:15,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:15,173 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1302 transitions. [2020-08-19 05:12:15,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:15,174 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1302 transitions. [2020-08-19 05:12:15,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 05:12:15,176 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:15,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:15,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 05:12:15,177 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:15,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:15,177 INFO L82 PathProgramCache]: Analyzing trace with hash 141780216, now seen corresponding path program 1 times [2020-08-19 05:12:15,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:15,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887113913] [2020-08-19 05:12:15,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:15,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:15,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:15,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:15,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887113913] [2020-08-19 05:12:15,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:15,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:15,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146665159] [2020-08-19 05:12:15,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:15,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:15,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:15,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:15,226 INFO L87 Difference]: Start difference. First operand 888 states and 1302 transitions. Second operand 3 states. [2020-08-19 05:12:15,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:15,264 INFO L93 Difference]: Finished difference Result 1548 states and 2312 transitions. [2020-08-19 05:12:15,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:15,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 05:12:15,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:15,273 INFO L225 Difference]: With dead ends: 1548 [2020-08-19 05:12:15,273 INFO L226 Difference]: Without dead ends: 1546 [2020-08-19 05:12:15,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:15,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-19 05:12:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1288. [2020-08-19 05:12:15,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2020-08-19 05:12:15,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1830 transitions. [2020-08-19 05:12:15,315 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1830 transitions. Word has length 24 [2020-08-19 05:12:15,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:15,315 INFO L479 AbstractCegarLoop]: Abstraction has 1288 states and 1830 transitions. [2020-08-19 05:12:15,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:15,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1830 transitions. [2020-08-19 05:12:15,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 05:12:15,318 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:15,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:15,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 05:12:15,319 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:15,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:15,319 INFO L82 PathProgramCache]: Analyzing trace with hash 399945654, now seen corresponding path program 1 times [2020-08-19 05:12:15,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:15,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124863508] [2020-08-19 05:12:15,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:15,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:15,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:15,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124863508] [2020-08-19 05:12:15,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:15,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:15,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065198567] [2020-08-19 05:12:15,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:15,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:15,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:15,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:15,343 INFO L87 Difference]: Start difference. First operand 1288 states and 1830 transitions. Second operand 3 states. [2020-08-19 05:12:15,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:15,383 INFO L93 Difference]: Finished difference Result 2956 states and 4200 transitions. [2020-08-19 05:12:15,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:15,384 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 05:12:15,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:15,393 INFO L225 Difference]: With dead ends: 2956 [2020-08-19 05:12:15,393 INFO L226 Difference]: Without dead ends: 1706 [2020-08-19 05:12:15,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:15,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-08-19 05:12:15,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1704. [2020-08-19 05:12:15,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-08-19 05:12:15,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2374 transitions. [2020-08-19 05:12:15,446 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2374 transitions. Word has length 24 [2020-08-19 05:12:15,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:15,446 INFO L479 AbstractCegarLoop]: Abstraction has 1704 states and 2374 transitions. [2020-08-19 05:12:15,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:15,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2374 transitions. [2020-08-19 05:12:15,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 05:12:15,450 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:15,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:15,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 05:12:15,450 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:15,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:15,450 INFO L82 PathProgramCache]: Analyzing trace with hash 100434809, now seen corresponding path program 1 times [2020-08-19 05:12:15,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:15,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296728084] [2020-08-19 05:12:15,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:15,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:15,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:15,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:15,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296728084] [2020-08-19 05:12:15,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:15,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:15,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930568659] [2020-08-19 05:12:15,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:15,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:15,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:15,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:15,484 INFO L87 Difference]: Start difference. First operand 1704 states and 2374 transitions. Second operand 3 states. [2020-08-19 05:12:15,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:15,526 INFO L93 Difference]: Finished difference Result 2556 states and 3544 transitions. [2020-08-19 05:12:15,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:15,527 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 05:12:15,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:15,535 INFO L225 Difference]: With dead ends: 2556 [2020-08-19 05:12:15,535 INFO L226 Difference]: Without dead ends: 1738 [2020-08-19 05:12:15,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:15,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-19 05:12:15,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1736. [2020-08-19 05:12:15,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-08-19 05:12:15,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2374 transitions. [2020-08-19 05:12:15,595 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2374 transitions. Word has length 25 [2020-08-19 05:12:15,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:15,595 INFO L479 AbstractCegarLoop]: Abstraction has 1736 states and 2374 transitions. [2020-08-19 05:12:15,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:15,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2374 transitions. [2020-08-19 05:12:15,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 05:12:15,599 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:15,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:15,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 05:12:15,600 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:15,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:15,600 INFO L82 PathProgramCache]: Analyzing trace with hash -486371205, now seen corresponding path program 1 times [2020-08-19 05:12:15,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:15,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288983263] [2020-08-19 05:12:15,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:15,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:15,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:15,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288983263] [2020-08-19 05:12:15,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:15,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:15,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180573093] [2020-08-19 05:12:15,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:15,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:15,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:15,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:15,640 INFO L87 Difference]: Start difference. First operand 1736 states and 2374 transitions. Second operand 3 states. [2020-08-19 05:12:15,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:15,726 INFO L93 Difference]: Finished difference Result 2956 states and 4104 transitions. [2020-08-19 05:12:15,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:15,727 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 05:12:15,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:15,743 INFO L225 Difference]: With dead ends: 2956 [2020-08-19 05:12:15,743 INFO L226 Difference]: Without dead ends: 2954 [2020-08-19 05:12:15,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:15,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-19 05:12:15,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2568. [2020-08-19 05:12:15,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-08-19 05:12:15,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3398 transitions. [2020-08-19 05:12:15,874 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3398 transitions. Word has length 25 [2020-08-19 05:12:15,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:15,875 INFO L479 AbstractCegarLoop]: Abstraction has 2568 states and 3398 transitions. [2020-08-19 05:12:15,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:15,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3398 transitions. [2020-08-19 05:12:15,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 05:12:15,886 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:15,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:15,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 05:12:15,888 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:15,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:15,889 INFO L82 PathProgramCache]: Analyzing trace with hash -228205767, now seen corresponding path program 1 times [2020-08-19 05:12:15,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:15,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110893253] [2020-08-19 05:12:15,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:15,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:15,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110893253] [2020-08-19 05:12:15,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:15,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:15,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126007409] [2020-08-19 05:12:15,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:15,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:15,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:15,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:15,921 INFO L87 Difference]: Start difference. First operand 2568 states and 3398 transitions. Second operand 3 states. [2020-08-19 05:12:16,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:16,006 INFO L93 Difference]: Finished difference Result 5836 states and 7688 transitions. [2020-08-19 05:12:16,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:16,006 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 05:12:16,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:16,021 INFO L225 Difference]: With dead ends: 5836 [2020-08-19 05:12:16,021 INFO L226 Difference]: Without dead ends: 3338 [2020-08-19 05:12:16,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:16,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-19 05:12:16,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2020-08-19 05:12:16,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-08-19 05:12:16,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4294 transitions. [2020-08-19 05:12:16,139 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4294 transitions. Word has length 25 [2020-08-19 05:12:16,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:16,139 INFO L479 AbstractCegarLoop]: Abstraction has 3336 states and 4294 transitions. [2020-08-19 05:12:16,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:16,140 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4294 transitions. [2020-08-19 05:12:16,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 05:12:16,144 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:16,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:16,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 05:12:16,147 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:16,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:16,147 INFO L82 PathProgramCache]: Analyzing trace with hash 2102577579, now seen corresponding path program 1 times [2020-08-19 05:12:16,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:16,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135355537] [2020-08-19 05:12:16,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:16,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:16,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135355537] [2020-08-19 05:12:16,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:16,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:16,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856029840] [2020-08-19 05:12:16,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:16,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:16,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:16,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:16,173 INFO L87 Difference]: Start difference. First operand 3336 states and 4294 transitions. Second operand 3 states. [2020-08-19 05:12:16,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:16,234 INFO L93 Difference]: Finished difference Result 5004 states and 6408 transitions. [2020-08-19 05:12:16,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:16,234 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 05:12:16,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:16,250 INFO L225 Difference]: With dead ends: 5004 [2020-08-19 05:12:16,250 INFO L226 Difference]: Without dead ends: 3402 [2020-08-19 05:12:16,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:16,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2020-08-19 05:12:16,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3400. [2020-08-19 05:12:16,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3400 states. [2020-08-19 05:12:16,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 4294 transitions. [2020-08-19 05:12:16,390 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 4294 transitions. Word has length 26 [2020-08-19 05:12:16,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:16,390 INFO L479 AbstractCegarLoop]: Abstraction has 3400 states and 4294 transitions. [2020-08-19 05:12:16,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:16,391 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 4294 transitions. [2020-08-19 05:12:16,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 05:12:16,396 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:16,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:16,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 05:12:16,397 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:16,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:16,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1515771565, now seen corresponding path program 1 times [2020-08-19 05:12:16,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:16,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368516344] [2020-08-19 05:12:16,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:16,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:16,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:16,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368516344] [2020-08-19 05:12:16,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:16,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:16,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204680128] [2020-08-19 05:12:16,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:16,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:16,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:16,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:16,419 INFO L87 Difference]: Start difference. First operand 3400 states and 4294 transitions. Second operand 3 states. [2020-08-19 05:12:16,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:16,525 INFO L93 Difference]: Finished difference Result 9804 states and 12104 transitions. [2020-08-19 05:12:16,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:16,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 05:12:16,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:16,574 INFO L225 Difference]: With dead ends: 9804 [2020-08-19 05:12:16,574 INFO L226 Difference]: Without dead ends: 6538 [2020-08-19 05:12:16,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:16,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2020-08-19 05:12:16,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 6536. [2020-08-19 05:12:16,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-19 05:12:16,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7814 transitions. [2020-08-19 05:12:16,779 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7814 transitions. Word has length 26 [2020-08-19 05:12:16,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:16,779 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7814 transitions. [2020-08-19 05:12:16,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:16,779 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7814 transitions. [2020-08-19 05:12:16,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 05:12:16,787 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:16,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:16,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 05:12:16,788 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:16,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:16,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1257606127, now seen corresponding path program 1 times [2020-08-19 05:12:16,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:16,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080771483] [2020-08-19 05:12:16,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:16,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:16,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:16,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080771483] [2020-08-19 05:12:16,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:16,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:16,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954322274] [2020-08-19 05:12:16,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:16,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:16,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:16,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:16,828 INFO L87 Difference]: Start difference. First operand 6536 states and 7814 transitions. Second operand 3 states. [2020-08-19 05:12:17,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:17,026 INFO L93 Difference]: Finished difference Result 7052 states and 8584 transitions. [2020-08-19 05:12:17,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:17,027 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 05:12:17,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:17,043 INFO L225 Difference]: With dead ends: 7052 [2020-08-19 05:12:17,043 INFO L226 Difference]: Without dead ends: 7050 [2020-08-19 05:12:17,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:17,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-08-19 05:12:17,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 6536. [2020-08-19 05:12:17,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-19 05:12:17,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7686 transitions. [2020-08-19 05:12:17,223 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7686 transitions. Word has length 26 [2020-08-19 05:12:17,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:17,223 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7686 transitions. [2020-08-19 05:12:17,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:17,223 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7686 transitions. [2020-08-19 05:12:17,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 05:12:17,237 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:17,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:17,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 05:12:17,238 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:17,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:17,238 INFO L82 PathProgramCache]: Analyzing trace with hash -255505650, now seen corresponding path program 1 times [2020-08-19 05:12:17,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:17,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191592051] [2020-08-19 05:12:17,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:17,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:17,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:17,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191592051] [2020-08-19 05:12:17,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:17,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:17,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483550221] [2020-08-19 05:12:17,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:17,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:17,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:17,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:17,263 INFO L87 Difference]: Start difference. First operand 6536 states and 7686 transitions. Second operand 3 states. [2020-08-19 05:12:17,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:17,410 INFO L93 Difference]: Finished difference Result 10634 states and 12423 transitions. [2020-08-19 05:12:17,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:17,411 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 05:12:17,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:17,431 INFO L225 Difference]: With dead ends: 10634 [2020-08-19 05:12:17,431 INFO L226 Difference]: Without dead ends: 10632 [2020-08-19 05:12:17,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:17,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2020-08-19 05:12:17,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 10120. [2020-08-19 05:12:17,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10120 states. [2020-08-19 05:12:17,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10120 states to 10120 states and 11654 transitions. [2020-08-19 05:12:17,678 INFO L78 Accepts]: Start accepts. Automaton has 10120 states and 11654 transitions. Word has length 27 [2020-08-19 05:12:17,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:17,678 INFO L479 AbstractCegarLoop]: Abstraction has 10120 states and 11654 transitions. [2020-08-19 05:12:17,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:17,679 INFO L276 IsEmpty]: Start isEmpty. Operand 10120 states and 11654 transitions. [2020-08-19 05:12:17,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 05:12:17,695 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:17,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:17,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 05:12:17,695 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:17,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:17,695 INFO L82 PathProgramCache]: Analyzing trace with hash 2659788, now seen corresponding path program 1 times [2020-08-19 05:12:17,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:17,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347470522] [2020-08-19 05:12:17,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:17,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:17,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:17,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:17,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347470522] [2020-08-19 05:12:17,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:17,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:17,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374561235] [2020-08-19 05:12:17,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:17,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:17,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:17,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:17,718 INFO L87 Difference]: Start difference. First operand 10120 states and 11654 transitions. Second operand 3 states. [2020-08-19 05:12:17,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:17,904 INFO L93 Difference]: Finished difference Result 22664 states and 25734 transitions. [2020-08-19 05:12:17,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:17,905 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 05:12:17,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:17,905 INFO L225 Difference]: With dead ends: 22664 [2020-08-19 05:12:17,905 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 05:12:17,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:17,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 05:12:17,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 05:12:17,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 05:12:17,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 05:12:17,938 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-08-19 05:12:17,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:17,938 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 05:12:17,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:17,938 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 05:12:17,938 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 05:12:17,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 05:12:17,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 05:12:17,965 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 05:12:17,965 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 05:12:17,965 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 05:12:17,965 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 05:12:17,965 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 05:12:17,966 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 05:12:17,966 INFO L268 CegarLoopResult]: For program point L93-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 05:12:17,966 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 149) no Hoare annotation was computed. [2020-08-19 05:12:17,966 INFO L268 CegarLoopResult]: For program point L85-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 05:12:17,966 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-08-19 05:12:17,966 INFO L268 CegarLoopResult]: For program point L77-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 05:12:17,966 INFO L268 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-08-19 05:12:17,966 INFO L268 CegarLoopResult]: For program point L69-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 05:12:17,967 INFO L268 CegarLoopResult]: For program point L61(lines 61 63) no Hoare annotation was computed. [2020-08-19 05:12:17,967 INFO L268 CegarLoopResult]: For program point L61-2(lines 36 144) no Hoare annotation was computed. [2020-08-19 05:12:17,967 INFO L268 CegarLoopResult]: For program point L119-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 05:12:17,967 INFO L268 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-08-19 05:12:17,967 INFO L271 CegarLoopResult]: At program point L145(lines 5 149) the Hoare annotation is: true [2020-08-19 05:12:17,967 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 149) no Hoare annotation was computed. [2020-08-19 05:12:17,967 INFO L268 CegarLoopResult]: For program point L104-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 05:12:17,967 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-19 05:12:17,967 INFO L268 CegarLoopResult]: For program point L129-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 05:12:17,969 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 147) no Hoare annotation was computed. [2020-08-19 05:12:17,969 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 149) the Hoare annotation is: true [2020-08-19 05:12:17,969 INFO L268 CegarLoopResult]: For program point L105(line 105) no Hoare annotation was computed. [2020-08-19 05:12:17,969 INFO L268 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-08-19 05:12:17,969 INFO L268 CegarLoopResult]: For program point L89-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 05:12:17,969 INFO L268 CegarLoopResult]: For program point L114-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 05:12:17,970 INFO L268 CegarLoopResult]: For program point L81-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 05:12:17,970 INFO L271 CegarLoopResult]: At program point L139-1(lines 36 144) the Hoare annotation is: true [2020-08-19 05:12:17,970 INFO L268 CegarLoopResult]: For program point L73-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 05:12:17,970 INFO L268 CegarLoopResult]: For program point L65-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 05:12:17,970 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-08-19 05:12:17,970 INFO L268 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-08-19 05:12:17,970 INFO L264 CegarLoopResult]: At program point L140-1(lines 5 149) the Hoare annotation is: false [2020-08-19 05:12:17,970 INFO L268 CegarLoopResult]: For program point L99-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 05:12:17,971 INFO L268 CegarLoopResult]: For program point L124-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 05:12:17,971 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-08-19 05:12:17,971 INFO L268 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-08-19 05:12:17,971 INFO L268 CegarLoopResult]: For program point L109-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 05:12:17,971 INFO L268 CegarLoopResult]: For program point L134-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 05:12:17,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 05:12:17 BoogieIcfgContainer [2020-08-19 05:12:17,991 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 05:12:17,994 INFO L168 Benchmark]: Toolchain (without parser) took 5615.80 ms. Allocated memory was 146.8 MB in the beginning and 338.2 MB in the end (delta: 191.4 MB). Free memory was 102.4 MB in the beginning and 120.0 MB in the end (delta: -17.6 MB). Peak memory consumption was 173.8 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:17,994 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 05:12:17,995 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.64 ms. Allocated memory is still 146.8 MB. Free memory was 102.2 MB in the beginning and 91.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:17,996 INFO L168 Benchmark]: Boogie Preprocessor took 124.25 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 91.8 MB in the beginning and 179.6 MB in the end (delta: -87.8 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:17,998 INFO L168 Benchmark]: RCFGBuilder took 336.43 ms. Allocated memory is still 202.4 MB. Free memory was 179.6 MB in the beginning and 161.0 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:18,003 INFO L168 Benchmark]: TraceAbstraction took 4855.49 ms. Allocated memory was 202.4 MB in the beginning and 338.2 MB in the end (delta: 135.8 MB). Free memory was 160.4 MB in the beginning and 120.0 MB in the end (delta: 40.3 MB). Peak memory consumption was 176.1 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:18,005 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 294.64 ms. Allocated memory is still 146.8 MB. Free memory was 102.2 MB in the beginning and 91.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.25 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 91.8 MB in the beginning and 179.6 MB in the end (delta: -87.8 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 336.43 ms. Allocated memory is still 202.4 MB. Free memory was 179.6 MB in the beginning and 161.0 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4855.49 ms. Allocated memory was 202.4 MB in the beginning and 338.2 MB in the end (delta: 135.8 MB). Free memory was 160.4 MB in the beginning and 120.0 MB in the end (delta: 40.3 MB). Peak memory consumption was 176.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 147]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.7s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1937 SDtfs, 926 SDslu, 1314 SDs, 0 SdLazy, 133 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10120occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 25 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 522 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 575 NumberOfCodeBlocks, 575 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 23930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...